Final answer:
Without the exact measurement of side QS, we cannot definitively select between 4.1 cm and 4.2 cm as both are correctly rounded to the nearest tenth. Options 'c)' and 'b)' are not rounded to the nearest tenth. Therefore, more information is needed to complete the statement accurately.
Step-by-step explanation:
To determine which answer choice is correct when rounding to the nearest tenth, we must first know the exact measurement of side QS, which is not provided in the problem. However, we can infer from the supplied information that when we measure objects, we may sometimes have to round the figures based on the smallest markings on our measuring tool. For example, if the measurement of side QS falls between 4.05 cm and 4.14 cm, we would round this measurement to 4.1 cm when rounding to the nearest tenth. If the measurement is between 4.15 cm and 4.24 cm, we would round to 4.2 cm.
Without the exact figure for side QS, we cannot confidently complete the statement. Nonetheless, it's clear that options 'a)' and 'd)' are the only possible answers since they are rounded to the nearest tenth, unlike 'c)' which is at the hundredth place, and 'b)' which does not show any decimal place and suggests no rounding has been applied.